Protector-frame for screens.



I H. ILLIG. PROTECTOR FRAME FOR SCREENS.

APPLICATION FILED MAY 25, 1911.

Patented Apr. 28, 1914 zflz'ilzess as. I 722 We)? Z024 HEINRICH ILLIG,0F FRANKFORT-O1\T-THE-MAI1 T-BOCKENHEIM, GERMANY.

PROTECTOR-FRAME FOR SCREENS.

Specification of Letters Patent.

Patented Apr. 28, 1914.

Application filed May 26, 1911. Serial No. 629,445.

To all whom it may concern Be it known that I, HEINRICH ILLIG,manufacturer, a subject of the German Emperor, and residing at Frankforton the Main- Bockenhein'i, Germany, have invented certain new and usefulImprovements in Pro-- tector-Frames for Screens-of which the followingis a specification.

My invention relates to improvements in protector frames for screens ofthat kind which comprise two lined glass plates and are particularlyadapted for photographical purposes.

The characteristic feature of the new binding 01' protector frameresides in the combination with a suitable number of clamping members ofU-shaped section and having longitudinally slotted ends, of cornerplates arranged to the inside of the adjacent ends of said clampingmembers and adapted to be connected thereto, and of longitudinalinsertions arranged on the inner sides of said clamping members andadapted to protect the screen from heat while the parts of the frame arebeing soldered as well as to take up the shocks striking the protectorframe. For this purpose the insertions are formed of elastic strips ormembers the adjacent ends of which are fitted with recesses forreceiving the corner plates.

One illustrative embodiment of my invention is represented by way ofexample in the accompanying drawing, wherein z- Figure 1 shows one halfof a screen provided with a protector frame in plan, and the other halfin horizontal section, Fig. 2 shows part of the same in perspective, andFig. 3 is an ei'ilarged horizontal sectional view.

The two plates 1 and 2 forming the screen are cemented together in knownmanner, and are rabbeted at 3; the U-shaped sides 4 of the protectorframe are pushed onto the reduced parts of the plates so that they donot rise above the surface of the two plates. The ends of the sides atare mitered so that they fit one another exactly. The vertical faces ofthe sides are provided at their abutting edges with narrow horizontalslots 5, through which the auxiliary corner plates 6, which clasp theglass plates within, are

visible. when these parts are assembled in the manner shown in Fig. 2the frame is quickly soldered by solder being brought by the point ofthe soldering iron into the slot 5, when it enters between thecontacting faces of the corner plate 6 and the sides 4 of the frame, andthus makes a good joint.

Preferably, elastic insertions 7, e. g. of vulcanized fiber, are placedbetween the sides a of the frame and the edges of the glass plates 1 andQ, the height of which will correspond to that of the reduced edges ofthe glass plates. The adjacent ends of these members having the form ofstrips are fitted with. suitable recesses 8 adapted to receive thecorner plates 6 so that they will aline with the surfaces of the members7. By means of these insertions all blows struck on the reduced edges ofthe screen are 1noderated and, in addition, the heat radiated from thesoldering iron is prevented from injuring the glass plates.

I claim 1. In a protector frame for screens, the combination with aframe, comprisingasuitable number of clamping members of U- shapedsection and having longitudinally slotted ends, of corner platesarranged on the inside of the adjacent ends of said members and adaptedto be connected thereto, and of longitudinal insertions arranged on theinner sides of said frame and adapted to take up the shocks striking theframe, substantially as set forth.

2. In a protector frame for screens, the combination with a frame,comprising a suitable number of clamping members of U- shaped sectionand having longitudinal slots in the ends, of corner plates soldered tothe inside of the adjacent ends of said members across said slots, andof elastic strips fitted with recesses for receiving said corner platesand adapted to form an elastic pad between said frame and the screen,substantially as set forth.

In testimony whereof, I aflix my signature in the presence of twowitnesses.

HEINRICH ILLIG. lVit-nesses HERMANN ECKERLIN, JEAN GRUND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

